Pileus Git - ~andy/linux/blob - drivers/scsi/megaraid/megaraid_sas_fusion.c

   1 /*
   2  *  Linux MegaRAID driver for SAS based RAID controllers
   3  *
   4  *  Copyright (c) 2009-2011  LSI Corporation.
   5  *
   6  *  This program is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU General Public License
   8  *  as published by the Free Software Foundation; either version 2
   9  *  of the License, or (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  *
  20  *  FILE: megaraid_sas_fusion.c
  21  *
  22  *  Authors: LSI Corporation
  23  *           Sumant Patro
  24  *           Adam Radford <linuxraid@lsi.com>
  25  *
  26  *  Send feedback to: <megaraidlinux@lsi.com>
  27  *
  28  *  Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
  29  *     ATTN: Linuxraid
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/types.h>
  34 #include <linux/pci.h>
  35 #include <linux/list.h>
  36 #include <linux/moduleparam.h>
  37 #include <linux/module.h>
  38 #include <linux/spinlock.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/delay.h>
  41 #include <linux/uio.h>
  42 #include <linux/uaccess.h>
  43 #include <linux/fs.h>
  44 #include <linux/compat.h>
  45 #include <linux/blkdev.h>
  46 #include <linux/mutex.h>
  47 #include <linux/poll.h>
  48
  49 #include <scsi/scsi.h>
  50 #include <scsi/scsi_cmnd.h>
  51 #include <scsi/scsi_device.h>
  52 #include <scsi/scsi_host.h>
  53
  54 #include "megaraid_sas_fusion.h"
  55 #include "megaraid_sas.h"
  56
  57 extern void megasas_free_cmds(struct megasas_instance *instance);
  58 extern struct megasas_cmd *megasas_get_cmd(struct megasas_instance
  59                                            *instance);
  60 extern void
  61 megasas_complete_cmd(struct megasas_instance *instance,
  62                      struct megasas_cmd *cmd, u8 alt_status);
  63 int megasas_is_ldio(struct scsi_cmnd *cmd);
  64 int
  65 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd);
  66
  67 void
  68 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd);
  69 int megasas_alloc_cmds(struct megasas_instance *instance);
  70 int
  71 megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs);
  72 int
  73 megasas_issue_polled(struct megasas_instance *instance,
  74                      struct megasas_cmd *cmd);
  75
  76 u8
  77 MR_BuildRaidContext(struct IO_REQUEST_INFO *io_info,
  78                     struct RAID_CONTEXT *pRAID_Context,
  79                     struct MR_FW_RAID_MAP_ALL *map);
  80 u16 MR_TargetIdToLdGet(u32 ldTgtId, struct MR_FW_RAID_MAP_ALL *map);
  81 struct MR_LD_RAID *MR_LdRaidGet(u32 ld, struct MR_FW_RAID_MAP_ALL *map);
  82
  83 u16 MR_GetLDTgtId(u32 ld, struct MR_FW_RAID_MAP_ALL *map);
  84
  85 void
  86 megasas_check_and_restore_queue_depth(struct megasas_instance *instance);
  87
  88 u8 MR_ValidateMapInfo(struct MR_FW_RAID_MAP_ALL *map,
  89                       struct LD_LOAD_BALANCE_INFO *lbInfo);
  90 u16 get_updated_dev_handle(struct LD_LOAD_BALANCE_INFO *lbInfo,
  91                            struct IO_REQUEST_INFO *in_info);
  92 int megasas_transition_to_ready(struct megasas_instance *instance);
  93 void megaraid_sas_kill_hba(struct megasas_instance *instance);
  94
  95 extern u32 megasas_dbg_lvl;
  96
  97 /**
  98  * megasas_enable_intr_fusion - Enables interrupts
  99  * @regs:                       MFI register set
 100  */
 101 void
 102 megasas_enable_intr_fusion(struct megasas_register_set __iomem *regs)
 103 {
 104         writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
 105
 106         /* Dummy readl to force pci flush */
 107         readl(&regs->outbound_intr_mask);
 108 }
 109
 110 /**
 111  * megasas_disable_intr_fusion - Disables interrupt
 112  * @regs:                        MFI register set
 113  */
 114 void
 115 megasas_disable_intr_fusion(struct megasas_register_set __iomem *regs)
 116 {
 117         u32 mask = 0xFFFFFFFF;
 118         u32 status;
 119
 120         writel(mask, &regs->outbound_intr_mask);
 121         /* Dummy readl to force pci flush */
 122         status = readl(&regs->outbound_intr_mask);
 123 }
 124
 125 int
 126 megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs)
 127 {
 128         u32 status;
 129         /*
 130          * Check if it is our interrupt
 131          */
 132         status = readl(&regs->outbound_intr_status);
 133
 134         if (status & 1) {
 135                 writel(status, &regs->outbound_intr_status);
 136                 readl(&regs->outbound_intr_status);
 137                 return 1;
 138         }
 139         if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK))
 140                 return 0;
 141
 142         /*
 143          * dummy read to flush PCI
 144          */
 145         readl(&regs->outbound_intr_status);
 146
 147         return 1;
 148 }
 149
 150 /**
 151  * megasas_get_cmd_fusion -     Get a command from the free pool
 152  * @instance:           Adapter soft state
 153  *
 154  * Returns a free command from the pool
 155  */
 156 struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
 157                                                   *instance)
 158 {
 159         unsigned long flags;
 160         struct fusion_context *fusion =
 161                 (struct fusion_context *)instance->ctrl_context;
 162         struct megasas_cmd_fusion *cmd = NULL;
 163
 164         spin_lock_irqsave(&fusion->cmd_pool_lock, flags);
 165
 166         if (!list_empty(&fusion->cmd_pool)) {
 167                 cmd = list_entry((&fusion->cmd_pool)->next,
 168                                  struct megasas_cmd_fusion, list);
 169                 list_del_init(&cmd->list);
 170         } else {
 171                 printk(KERN_ERR "megasas: Command pool (fusion) empty!\n");
 172         }
 173
 174         spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags);
 175         return cmd;
 176 }
 177
 178 /**
 179  * megasas_return_cmd_fusion -  Return a cmd to free command pool
 180  * @instance:           Adapter soft state
 181  * @cmd:                Command packet to be returned to free command pool
 182  */
 183 static inline void
 184 megasas_return_cmd_fusion(struct megasas_instance *instance,
 185                           struct megasas_cmd_fusion *cmd)
 186 {
 187         unsigned long flags;
 188         struct fusion_context *fusion =
 189                 (struct fusion_context *)instance->ctrl_context;
 190
 191         spin_lock_irqsave(&fusion->cmd_pool_lock, flags);
 192
 193         cmd->scmd = NULL;
 194         cmd->sync_cmd_idx = (u32)ULONG_MAX;
 195         list_add_tail(&cmd->list, &fusion->cmd_pool);
 196
 197         spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags);
 198 }
 199
 200 /**
 201  * megasas_teardown_frame_pool_fusion - Destroy the cmd frame DMA pool
 202  * @instance:                           Adapter soft state
 203  */
 204 static void megasas_teardown_frame_pool_fusion(
 205         struct megasas_instance *instance)
 206 {
 207         int i;
 208         struct fusion_context *fusion = instance->ctrl_context;
 209
 210         u16 max_cmd = instance->max_fw_cmds;
 211
 212         struct megasas_cmd_fusion *cmd;
 213
 214         if (!fusion->sg_dma_pool || !fusion->sense_dma_pool) {
 215                 printk(KERN_ERR "megasas: dma pool is null. SG Pool %p, "
 216                        "sense pool : %p\n", fusion->sg_dma_pool,
 217                        fusion->sense_dma_pool);
 218                 return;
 219         }
 220
 221         /*
 222          * Return all frames to pool
 223          */
 224         for (i = 0; i < max_cmd; i++) {
 225
 226                 cmd = fusion->cmd_list[i];
 227
 228                 if (cmd->sg_frame)
 229                         pci_pool_free(fusion->sg_dma_pool, cmd->sg_frame,
 230                                       cmd->sg_frame_phys_addr);
 231
 232                 if (cmd->sense)
 233                         pci_pool_free(fusion->sense_dma_pool, cmd->sense,
 234                                       cmd->sense_phys_addr);
 235         }
 236
 237         /*
 238          * Now destroy the pool itself
 239          */
 240         pci_pool_destroy(fusion->sg_dma_pool);
 241         pci_pool_destroy(fusion->sense_dma_pool);
 242
 243         fusion->sg_dma_pool = NULL;
 244         fusion->sense_dma_pool = NULL;
 245 }
 246
 247 /**
 248  * megasas_free_cmds_fusion -   Free all the cmds in the free cmd pool
 249  * @instance:           Adapter soft state
 250  */
 251 void
 252 megasas_free_cmds_fusion(struct megasas_instance *instance)
 253 {
 254         int i;
 255         struct fusion_context *fusion = instance->ctrl_context;
 256
 257         u32 max_cmds, req_sz, reply_sz, io_frames_sz;
 258
 259
 260         req_sz = fusion->request_alloc_sz;
 261         reply_sz = fusion->reply_alloc_sz;
 262         io_frames_sz = fusion->io_frames_alloc_sz;
 263
 264         max_cmds = instance->max_fw_cmds;
 265
 266         /* Free descriptors and request Frames memory */
 267         if (fusion->req_frames_desc)
 268                 dma_free_coherent(&instance->pdev->dev, req_sz,
 269                                   fusion->req_frames_desc,
 270                                   fusion->req_frames_desc_phys);
 271
 272         if (fusion->reply_frames_desc) {
 273                 pci_pool_free(fusion->reply_frames_desc_pool,
 274                               fusion->reply_frames_desc,
 275                               fusion->reply_frames_desc_phys);
 276                 pci_pool_destroy(fusion->reply_frames_desc_pool);
 277         }
 278
 279         if (fusion->io_request_frames) {
 280                 pci_pool_free(fusion->io_request_frames_pool,
 281                               fusion->io_request_frames,
 282                               fusion->io_request_frames_phys);
 283                 pci_pool_destroy(fusion->io_request_frames_pool);
 284         }
 285
 286         /* Free the Fusion frame pool */
 287         megasas_teardown_frame_pool_fusion(instance);
 288
 289         /* Free all the commands in the cmd_list */
 290         for (i = 0; i < max_cmds; i++)
 291                 kfree(fusion->cmd_list[i]);
 292
 293         /* Free the cmd_list buffer itself */
 294         kfree(fusion->cmd_list);
 295         fusion->cmd_list = NULL;
 296
 297         INIT_LIST_HEAD(&fusion->cmd_pool);
 298 }
 299
 300 /**
 301  * megasas_create_frame_pool_fusion -   Creates DMA pool for cmd frames
 302  * @instance:                   Adapter soft state
 303  *
 304  */
 305 static int megasas_create_frame_pool_fusion(struct megasas_instance *instance)
 306 {
 307         int i;
 308         u32 max_cmd;
 309         struct fusion_context *fusion;
 310         struct megasas_cmd_fusion *cmd;
 311         u32 total_sz_chain_frame;
 312
 313         fusion = instance->ctrl_context;
 314         max_cmd = instance->max_fw_cmds;
 315
 316         total_sz_chain_frame = MEGASAS_MAX_SZ_CHAIN_FRAME;
 317
 318         /*
 319          * Use DMA pool facility provided by PCI layer
 320          */
 321
 322         fusion->sg_dma_pool = pci_pool_create("megasas sg pool fusion",
 323                                               instance->pdev,
 324                                               total_sz_chain_frame, 4,
 325                                               0);
 326         if (!fusion->sg_dma_pool) {
 327                 printk(KERN_DEBUG "megasas: failed to setup request pool "
 328                        "fusion\n");
 329                 return -ENOMEM;
 330         }
 331         fusion->sense_dma_pool = pci_pool_create("megasas sense pool fusion",
 332                                                  instance->pdev,
 333                                                  SCSI_SENSE_BUFFERSIZE, 64, 0);
 334
 335         if (!fusion->sense_dma_pool) {
 336                 printk(KERN_DEBUG "megasas: failed to setup sense pool "
 337                        "fusion\n");
 338                 pci_pool_destroy(fusion->sg_dma_pool);
 339                 fusion->sg_dma_pool = NULL;
 340                 return -ENOMEM;
 341         }
 342
 343         /*
 344          * Allocate and attach a frame to each of the commands in cmd_list
 345          */
 346         for (i = 0; i < max_cmd; i++) {
 347
 348                 cmd = fusion->cmd_list[i];
 349
 350                 cmd->sg_frame = pci_pool_alloc(fusion->sg_dma_pool,
 351                                                GFP_KERNEL,
 352                                                &cmd->sg_frame_phys_addr);
 353
 354                 cmd->sense = pci_pool_alloc(fusion->sense_dma_pool,
 355                                             GFP_KERNEL, &cmd->sense_phys_addr);
 356                 /*
 357                  * megasas_teardown_frame_pool_fusion() takes care of freeing
 358                  * whatever has been allocated
 359                  */
 360                 if (!cmd->sg_frame || !cmd->sense) {
 361                         printk(KERN_DEBUG "megasas: pci_pool_alloc failed\n");
 362                         megasas_teardown_frame_pool_fusion(instance);
 363                         return -ENOMEM;
 364                 }
 365         }
 366         return 0;
 367 }
 368
 369 /**
 370  * megasas_alloc_cmds_fusion -  Allocates the command packets
 371  * @instance:           Adapter soft state
 372  *
 373  *
 374  * Each frame has a 32-bit field called context. This context is used to get
 375  * back the megasas_cmd_fusion from the frame when a frame gets completed
 376  * In this driver, the 32 bit values are the indices into an array cmd_list.
 377  * This array is used only to look up the megasas_cmd_fusion given the context.
 378  * The free commands themselves are maintained in a linked list called cmd_pool.
 379  *
 380  * cmds are formed in the io_request and sg_frame members of the
 381  * megasas_cmd_fusion. The context field is used to get a request descriptor
 382  * and is used as SMID of the cmd.
 383  * SMID value range is from 1 to max_fw_cmds.
 384  */
 385 int
 386 megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 387 {
 388         int i, j;
 389         u32 max_cmd, io_frames_sz;
 390         struct fusion_context *fusion;
 391         struct megasas_cmd_fusion *cmd;
 392         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
 393         u32 offset;
 394         dma_addr_t io_req_base_phys;
 395         u8 *io_req_base;
 396
 397         fusion = instance->ctrl_context;
 398
 399         max_cmd = instance->max_fw_cmds;
 400
 401         fusion->req_frames_desc =
 402                 dma_alloc_coherent(&instance->pdev->dev,
 403                                    fusion->request_alloc_sz,
 404                                    &fusion->req_frames_desc_phys, GFP_KERNEL);
 405
 406         if (!fusion->req_frames_desc) {
 407                 printk(KERN_ERR "megasas; Could not allocate memory for "
 408                        "request_frames\n");
 409                 goto fail_req_desc;
 410         }
 411
 412         fusion->reply_frames_desc_pool =
 413                 pci_pool_create("reply_frames pool", instance->pdev,
 414                                 fusion->reply_alloc_sz, 16, 0);
 415
 416         if (!fusion->reply_frames_desc_pool) {
 417                 printk(KERN_ERR "megasas; Could not allocate memory for "
 418                        "reply_frame pool\n");
 419                 goto fail_reply_desc;
 420         }
 421
 422         fusion->reply_frames_desc =
 423                 pci_pool_alloc(fusion->reply_frames_desc_pool, GFP_KERNEL,
 424                                &fusion->reply_frames_desc_phys);
 425         if (!fusion->reply_frames_desc) {
 426                 printk(KERN_ERR "megasas; Could not allocate memory for "
 427                        "reply_frame pool\n");
 428                 pci_pool_destroy(fusion->reply_frames_desc_pool);
 429                 goto fail_reply_desc;
 430         }
 431
 432         reply_desc = fusion->reply_frames_desc;
 433         for (i = 0; i < fusion->reply_q_depth; i++, reply_desc++)
 434                 reply_desc->Words = ULLONG_MAX;
 435
 436         io_frames_sz = fusion->io_frames_alloc_sz;
 437
 438         fusion->io_request_frames_pool =
 439                 pci_pool_create("io_request_frames pool", instance->pdev,
 440                                 fusion->io_frames_alloc_sz, 16, 0);
 441
 442         if (!fusion->io_request_frames_pool) {
 443                 printk(KERN_ERR "megasas: Could not allocate memory for "
 444                        "io_request_frame pool\n");
 445                 goto fail_io_frames;
 446         }
 447
 448         fusion->io_request_frames =
 449                 pci_pool_alloc(fusion->io_request_frames_pool, GFP_KERNEL,
 450                                &fusion->io_request_frames_phys);
 451         if (!fusion->io_request_frames) {
 452                 printk(KERN_ERR "megasas: Could not allocate memory for "
 453                        "io_request_frames frames\n");
 454                 pci_pool_destroy(fusion->io_request_frames_pool);
 455                 goto fail_io_frames;
 456         }
 457
 458         /*
 459          * fusion->cmd_list is an array of struct megasas_cmd_fusion pointers.
 460          * Allocate the dynamic array first and then allocate individual
 461          * commands.
 462          */
 463         fusion->cmd_list = kmalloc(sizeof(struct megasas_cmd_fusion *)
 464                                    *max_cmd, GFP_KERNEL);
 465
 466         if (!fusion->cmd_list) {
 467                 printk(KERN_DEBUG "megasas: out of memory. Could not alloc "
 468                        "memory for cmd_list_fusion\n");
 469                 goto fail_cmd_list;
 470         }
 471
 472         memset(fusion->cmd_list, 0, sizeof(struct megasas_cmd_fusion *)
 473                *max_cmd);
 474
 475         max_cmd = instance->max_fw_cmds;
 476         for (i = 0; i < max_cmd; i++) {
 477                 fusion->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd_fusion),
 478                                               GFP_KERNEL);
 479                 if (!fusion->cmd_list[i]) {
 480                         printk(KERN_ERR "Could not alloc cmd list fusion\n");
 481
 482                         for (j = 0; j < i; j++)
 483                                 kfree(fusion->cmd_list[j]);
 484
 485                         kfree(fusion->cmd_list);
 486                         fusion->cmd_list = NULL;
 487                         goto fail_cmd_list;
 488                 }
 489         }
 490
 491         /* The first 256 bytes (SMID 0) is not used. Don't add to cmd list */
 492         io_req_base = fusion->io_request_frames +
 493                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 494         io_req_base_phys = fusion->io_request_frames_phys +
 495                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
 496
 497         /*
 498          * Add all the commands to command pool (fusion->cmd_pool)
 499          */
 500
 501         /* SMID 0 is reserved. Set SMID/index from 1 */
 502         for (i = 0; i < max_cmd; i++) {
 503                 cmd = fusion->cmd_list[i];
 504                 offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i;
 505                 memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
 506                 cmd->index = i + 1;
 507                 cmd->scmd = NULL;
 508                 cmd->sync_cmd_idx = (u32)ULONG_MAX; /* Set to Invalid */
 509                 cmd->instance = instance;
 510                 cmd->io_request =
 511                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
 512                   (io_req_base + offset);
 513                 memset(cmd->io_request, 0,
 514                        sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
 515                 cmd->io_request_phys_addr = io_req_base_phys + offset;
 516
 517                 list_add_tail(&cmd->list, &fusion->cmd_pool);
 518         }
 519
 520         /*
 521          * Create a frame pool and assign one frame to each cmd
 522          */
 523         if (megasas_create_frame_pool_fusion(instance)) {
 524                 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
 525                 megasas_free_cmds_fusion(instance);
 526                 goto fail_req_desc;
 527         }
 528
 529         return 0;
 530
 531 fail_cmd_list:
 532         pci_pool_free(fusion->io_request_frames_pool, fusion->io_request_frames,
 533                       fusion->io_request_frames_phys);
 534         pci_pool_destroy(fusion->io_request_frames_pool);
 535 fail_io_frames:
 536         dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
 537                           fusion->reply_frames_desc,
 538                           fusion->reply_frames_desc_phys);
 539         pci_pool_free(fusion->reply_frames_desc_pool,
 540                       fusion->reply_frames_desc,
 541                       fusion->reply_frames_desc_phys);
 542         pci_pool_destroy(fusion->reply_frames_desc_pool);
 543
 544 fail_reply_desc:
 545         dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
 546                           fusion->req_frames_desc,
 547                           fusion->req_frames_desc_phys);
 548 fail_req_desc:
 549         return -ENOMEM;
 550 }
 551
 552 /**
 553  * wait_and_poll -      Issues a polling command
 554  * @instance:                   Adapter soft state
 555  * @cmd:                        Command packet to be issued
 556  *
 557  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
 558  */
 559 int
 560 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd)
 561 {
 562         int i;
 563         struct megasas_header *frame_hdr = &cmd->frame->hdr;
 564
 565         u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000;
 566
 567         /*
 568          * Wait for cmd_status to change
 569          */
 570         for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) {
 571                 rmb();
 572                 msleep(20);
 573         }
 574
 575         if (frame_hdr->cmd_status == 0xff)
 576                 return -ETIME;
 577
 578         return 0;
 579 }
 580
 581 /**
 582  * megasas_ioc_init_fusion -    Initializes the FW
 583  * @instance:           Adapter soft state
 584  *
 585  * Issues the IOC Init cmd
 586  */
 587 int
 588 megasas_ioc_init_fusion(struct megasas_instance *instance)
 589 {
 590         struct megasas_init_frame *init_frame;
 591         struct MPI2_IOC_INIT_REQUEST *IOCInitMessage;
 592         dma_addr_t      ioc_init_handle;
 593         u32 context;
 594         struct megasas_cmd *cmd;
 595         u8 ret;
 596         struct fusion_context *fusion;
 597         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
 598         int i;
 599         struct megasas_header *frame_hdr;
 600
 601         fusion = instance->ctrl_context;
 602
 603         cmd = megasas_get_cmd(instance);
 604
 605         if (!cmd) {
 606                 printk(KERN_ERR "Could not allocate cmd for INIT Frame\n");
 607                 ret = 1;
 608                 goto fail_get_cmd;
 609         }
 610
 611         IOCInitMessage =
 612           dma_alloc_coherent(&instance->pdev->dev,
 613                              sizeof(struct MPI2_IOC_INIT_REQUEST),
 614                              &ioc_init_handle, GFP_KERNEL);
 615
 616         if (!IOCInitMessage) {
 617                 printk(KERN_ERR "Could not allocate memory for "
 618                        "IOCInitMessage\n");
 619                 ret = 1;
 620                 goto fail_fw_init;
 621         }
 622
 623         memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST));
 624
 625         IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT;
 626         IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER;
 627         IOCInitMessage->MsgVersion = MPI2_VERSION;
 628         IOCInitMessage->HeaderVersion = MPI2_HEADER_VERSION;
 629         IOCInitMessage->SystemRequestFrameSize =
 630                 MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4;
 631
 632         IOCInitMessage->ReplyDescriptorPostQueueDepth = fusion->reply_q_depth;
 633         IOCInitMessage->ReplyDescriptorPostQueueAddress =
 634                 fusion->reply_frames_desc_phys;
 635         IOCInitMessage->SystemRequestFrameBaseAddress =
 636                 fusion->io_request_frames_phys;
 637
 638         init_frame = (struct megasas_init_frame *)cmd->frame;
 639         memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
 640
 641         frame_hdr = &cmd->frame->hdr;
 642         context = init_frame->context;
 643         init_frame->context = context;
 644
 645         frame_hdr->cmd_status = 0xFF;
 646         frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
 647
 648         init_frame->cmd = MFI_CMD_INIT;
 649         init_frame->cmd_status = 0xFF;
 650
 651         init_frame->queue_info_new_phys_addr_lo = ioc_init_handle;
 652         init_frame->data_xfer_len = sizeof(struct MPI2_IOC_INIT_REQUEST);
 653
 654         req_desc =
 655           (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)fusion->req_frames_desc;
 656
 657         req_desc->Words = cmd->frame_phys_addr;
 658         req_desc->MFAIo.RequestFlags =
 659                 (MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
 660                  MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
 661
 662         /*
 663          * disable the intr before firing the init frame
 664          */
 665         instance->instancet->disable_intr(instance->reg_set);
 666
 667         for (i = 0; i < (10 * 1000); i += 20) {
 668                 if (readl(&instance->reg_set->doorbell) & 1)
 669                         msleep(20);
 670                 else
 671                         break;
 672         }
 673
 674         instance->instancet->fire_cmd(instance, req_desc->u.low,
 675                                       req_desc->u.high, instance->reg_set);
 676
 677         wait_and_poll(instance, cmd);
 678
 679         frame_hdr = &cmd->frame->hdr;
 680         if (frame_hdr->cmd_status != 0) {
 681                 ret = 1;
 682                 goto fail_fw_init;
 683         }
 684         printk(KERN_ERR "megasas:IOC Init cmd success\n");
 685
 686         ret = 0;
 687
 688 fail_fw_init:
 689         megasas_return_cmd(instance, cmd);
 690         if (IOCInitMessage)
 691                 dma_free_coherent(&instance->pdev->dev,
 692                                   sizeof(struct MPI2_IOC_INIT_REQUEST),
 693                                   IOCInitMessage, ioc_init_handle);
 694 fail_get_cmd:
 695         return ret;
 696 }
 697
 698 /*
 699  * megasas_return_cmd_for_smid -        Returns a cmd_fusion for a SMID
 700  * @instance:                           Adapter soft state
 701  *
 702  */
 703 void
 704 megasas_return_cmd_for_smid(struct megasas_instance *instance, u16 smid)
 705 {
 706         struct fusion_context *fusion;
 707         struct megasas_cmd_fusion *cmd;
 708
 709         fusion = instance->ctrl_context;
 710         cmd = fusion->cmd_list[smid - 1];
 711         megasas_return_cmd_fusion(instance, cmd);
 712 }
 713
 714 /*
 715  * megasas_get_ld_map_info -    Returns FW's ld_map structure
 716  * @instance:                           Adapter soft state
 717  * @pend:                               Pend the command or not
 718  * Issues an internal command (DCMD) to get the FW's controller PD
 719  * list structure.  This information is mainly used to find out SYSTEM
 720  * supported by the FW.
 721  */
 722 static int
 723 megasas_get_ld_map_info(struct megasas_instance *instance)
 724 {
 725         int ret = 0;
 726         struct megasas_cmd *cmd;
 727         struct megasas_dcmd_frame *dcmd;
 728         struct MR_FW_RAID_MAP_ALL *ci;
 729         dma_addr_t ci_h = 0;
 730         u32 size_map_info;
 731         struct fusion_context *fusion;
 732
 733         cmd = megasas_get_cmd(instance);
 734
 735         if (!cmd) {
 736                 printk(KERN_DEBUG "megasas: Failed to get cmd for map info.\n");
 737                 return -ENOMEM;
 738         }
 739
 740         fusion = instance->ctrl_context;
 741
 742         if (!fusion) {
 743                 megasas_return_cmd(instance, cmd);
 744                 return 1;
 745         }
 746
 747         dcmd = &cmd->frame->dcmd;
 748
 749         size_map_info = sizeof(struct MR_FW_RAID_MAP) +
 750                 (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
 751
 752         ci = fusion->ld_map[(instance->map_id & 1)];
 753         ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
 754
 755         if (!ci) {
 756                 printk(KERN_DEBUG "Failed to alloc mem for ld_map_info\n");
 757                 megasas_return_cmd(instance, cmd);
 758                 return -ENOMEM;
 759         }
 760
 761         memset(ci, 0, sizeof(*ci));
 762         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
 763
 764         dcmd->cmd = MFI_CMD_DCMD;
 765         dcmd->cmd_status = 0xFF;
 766         dcmd->sge_count = 1;
 767         dcmd->flags = MFI_FRAME_DIR_READ;
 768         dcmd->timeout = 0;
 769         dcmd->pad_0 = 0;
 770         dcmd->data_xfer_len = size_map_info;
 771         dcmd->opcode = MR_DCMD_LD_MAP_GET_INFO;
 772         dcmd->sgl.sge32[0].phys_addr = ci_h;
 773         dcmd->sgl.sge32[0].length = size_map_info;
 774
 775         if (!megasas_issue_polled(instance, cmd))
 776                 ret = 0;
 777         else {
 778                 printk(KERN_ERR "megasas: Get LD Map Info Failed\n");
 779                 ret = -1;
 780         }
 781
 782         megasas_return_cmd(instance, cmd);
 783
 784         return ret;
 785 }
 786
 787 u8
 788 megasas_get_map_info(struct megasas_instance *instance)
 789 {
 790         struct fusion_context *fusion = instance->ctrl_context;
 791
 792         fusion->fast_path_io = 0;
 793         if (!megasas_get_ld_map_info(instance)) {
 794                 if (MR_ValidateMapInfo(fusion->ld_map[(instance->map_id & 1)],
 795                                        fusion->load_balance_info)) {
 796                         fusion->fast_path_io = 1;
 797                         return 0;
 798                 }
 799         }
 800         return 1;
 801 }
 802
 803 /*
 804  * megasas_sync_map_info -      Returns FW's ld_map structure
 805  * @instance:                           Adapter soft state
 806  *
 807  * Issues an internal command (DCMD) to get the FW's controller PD
 808  * list structure.  This information is mainly used to find out SYSTEM
 809  * supported by the FW.
 810  */
 811 int
 812 megasas_sync_map_info(struct megasas_instance *instance)
 813 {
 814         int ret = 0, i;
 815         struct megasas_cmd *cmd;
 816         struct megasas_dcmd_frame *dcmd;
 817         u32 size_sync_info, num_lds;
 818         struct fusion_context *fusion;
 819         struct MR_LD_TARGET_SYNC *ci = NULL;
 820         struct MR_FW_RAID_MAP_ALL *map;
 821         struct MR_LD_RAID  *raid;
 822         struct MR_LD_TARGET_SYNC *ld_sync;
 823         dma_addr_t ci_h = 0;
 824         u32 size_map_info;
 825
 826         cmd = megasas_get_cmd(instance);
 827
 828         if (!cmd) {
 829                 printk(KERN_DEBUG "megasas: Failed to get cmd for sync"
 830                        "info.\n");
 831                 return -ENOMEM;
 832         }
 833
 834         fusion = instance->ctrl_context;
 835
 836         if (!fusion) {
 837                 megasas_return_cmd(instance, cmd);
 838                 return 1;
 839         }
 840
 841         map = fusion->ld_map[instance->map_id & 1];
 842
 843         num_lds = map->raidMap.ldCount;
 844
 845         dcmd = &cmd->frame->dcmd;
 846
 847         size_sync_info = sizeof(struct MR_LD_TARGET_SYNC) *num_lds;
 848
 849         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
 850
 851         ci = (struct MR_LD_TARGET_SYNC *)
 852           fusion->ld_map[(instance->map_id - 1) & 1];
 853         memset(ci, 0, sizeof(struct MR_FW_RAID_MAP_ALL));
 854
 855         ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1];
 856
 857         ld_sync = (struct MR_LD_TARGET_SYNC *)ci;
 858
 859         for (i = 0; i < num_lds; i++, ld_sync++) {
 860                 raid = MR_LdRaidGet(i, map);
 861                 ld_sync->targetId = MR_GetLDTgtId(i, map);
 862                 ld_sync->seqNum = raid->seqNum;
 863         }
 864
 865         size_map_info = sizeof(struct MR_FW_RAID_MAP) +
 866                 (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
 867
 868         dcmd->cmd = MFI_CMD_DCMD;
 869         dcmd->cmd_status = 0xFF;
 870         dcmd->sge_count = 1;
 871         dcmd->flags = MFI_FRAME_DIR_WRITE;
 872         dcmd->timeout = 0;
 873         dcmd->pad_0 = 0;
 874         dcmd->data_xfer_len = size_map_info;
 875         dcmd->mbox.b[0] = num_lds;
 876         dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG;
 877         dcmd->opcode = MR_DCMD_LD_MAP_GET_INFO;
 878         dcmd->sgl.sge32[0].phys_addr = ci_h;
 879         dcmd->sgl.sge32[0].length = size_map_info;
 880
 881         instance->map_update_cmd = cmd;
 882
 883         instance->instancet->issue_dcmd(instance, cmd);
 884
 885         return ret;
 886 }
 887
 888 /**
 889  * megasas_init_adapter_fusion -        Initializes the FW
 890  * @instance:           Adapter soft state
 891  *
 892  * This is the main function for initializing firmware.
 893  */
 894 u32
 895 megasas_init_adapter_fusion(struct megasas_instance *instance)
 896 {
 897         struct megasas_register_set __iomem *reg_set;
 898         struct fusion_context *fusion;
 899         u32 max_cmd;
 900         int i = 0;
 901
 902         fusion = instance->ctrl_context;
 903
 904         reg_set = instance->reg_set;
 905
 906         /*
 907          * Get various operational parameters from status register
 908          */
 909         instance->max_fw_cmds =
 910                 instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
 911         instance->max_fw_cmds = min(instance->max_fw_cmds, (u16)1008);
 912
 913         /*
 914          * Reduce the max supported cmds by 1. This is to ensure that the
 915          * reply_q_sz (1 more than the max cmd that driver may send)
 916          * does not exceed max cmds that the FW can support
 917          */
 918         instance->max_fw_cmds = instance->max_fw_cmds-1;
 919         /* Only internal cmds (DCMD) need to have MFI frames */
 920         instance->max_mfi_cmds = MEGASAS_INT_CMDS;
 921
 922         max_cmd = instance->max_fw_cmds;
 923
 924         fusion->reply_q_depth = ((max_cmd + 1 + 15)/16)*16;
 925
 926         fusion->request_alloc_sz =
 927                 sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *max_cmd;
 928         fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION)
 929                 *(fusion->reply_q_depth);
 930         fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE +
 931                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE *
 932                  (max_cmd + 1)); /* Extra 1 for SMID 0 */
 933
 934         fusion->max_sge_in_main_msg =
 935           (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
 936            offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16;
 937
 938         fusion->max_sge_in_chain =
 939                 MEGASAS_MAX_SZ_CHAIN_FRAME / sizeof(union MPI2_SGE_IO_UNION);
 940
 941         instance->max_num_sge = fusion->max_sge_in_main_msg +
 942                 fusion->max_sge_in_chain - 2;
 943
 944         /* Used for pass thru MFI frame (DCMD) */
 945         fusion->chain_offset_mfi_pthru =
 946                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16;
 947
 948         fusion->chain_offset_io_request =
 949                 (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
 950                  sizeof(union MPI2_SGE_IO_UNION))/16;
 951
 952         fusion->last_reply_idx = 0;
 953
 954         /*
 955          * Allocate memory for descriptors
 956          * Create a pool of commands
 957          */
 958         if (megasas_alloc_cmds(instance))
 959                 goto fail_alloc_mfi_cmds;
 960         if (megasas_alloc_cmds_fusion(instance))
 961                 goto fail_alloc_cmds;
 962
 963         if (megasas_ioc_init_fusion(instance))
 964                 goto fail_ioc_init;
 965
 966         instance->flag_ieee = 1;
 967
 968         fusion->map_sz =  sizeof(struct MR_FW_RAID_MAP) +
 969           (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
 970
 971         fusion->fast_path_io = 0;
 972
 973         for (i = 0; i < 2; i++) {
 974                 fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev,
 975                                                        fusion->map_sz,
 976                                                        &fusion->ld_map_phys[i],
 977                                                        GFP_KERNEL);
 978                 if (!fusion->ld_map[i]) {
 979                         printk(KERN_ERR "megasas: Could not allocate memory "
 980                                "for map info\n");
 981                         goto fail_map_info;
 982                 }
 983         }
 984
 985         if (!megasas_get_map_info(instance))
 986                 megasas_sync_map_info(instance);
 987
 988         return 0;
 989
 990 fail_map_info:
 991         if (i == 1)
 992                 dma_free_coherent(&instance->pdev->dev, fusion->map_sz,
 993                                   fusion->ld_map[0], fusion->ld_map_phys[0]);
 994 fail_ioc_init:
 995         megasas_free_cmds_fusion(instance);
 996 fail_alloc_cmds:
 997         megasas_free_cmds(instance);
 998 fail_alloc_mfi_cmds:
 999         return 1;
1000 }
1001
1002 /**
1003  * megasas_fire_cmd_fusion -    Sends command to the FW
1004  * @frame_phys_addr :           Physical address of cmd
1005  * @frame_count :               Number of frames for the command
1006  * @regs :                      MFI register set
1007  */
1008 void
1009 megasas_fire_cmd_fusion(struct megasas_instance *instance,
1010                         dma_addr_t req_desc_lo,
1011                         u32 req_desc_hi,
1012                         struct megasas_register_set __iomem *regs)
1013 {
1014         unsigned long flags;
1015
1016         spin_lock_irqsave(&instance->hba_lock, flags);
1017
1018         writel(req_desc_lo,
1019                &(regs)->inbound_low_queue_port);
1020         writel(req_desc_hi, &(regs)->inbound_high_queue_port);
1021         spin_unlock_irqrestore(&instance->hba_lock, flags);
1022 }
1023
1024 /**
1025  * map_cmd_status -     Maps FW cmd status to OS cmd status
1026  * @cmd :               Pointer to cmd
1027  * @status :            status of cmd returned by FW
1028  * @ext_status :        ext status of cmd returned by FW
1029  */
1030
1031 void
1032 map_cmd_status(struct megasas_cmd_fusion *cmd, u8 status, u8 ext_status)
1033 {
1034
1035         switch (status) {
1036
1037         case MFI_STAT_OK:
1038                 cmd->scmd->result = DID_OK << 16;
1039                 break;
1040
1041         case MFI_STAT_SCSI_IO_FAILED:
1042         case MFI_STAT_LD_INIT_IN_PROGRESS:
1043                 cmd->scmd->result = (DID_ERROR << 16) | ext_status;
1044                 break;
1045
1046         case MFI_STAT_SCSI_DONE_WITH_ERROR:
1047
1048                 cmd->scmd->result = (DID_OK << 16) | ext_status;
1049                 if (ext_status == SAM_STAT_CHECK_CONDITION) {
1050                         memset(cmd->scmd->sense_buffer, 0,
1051                                SCSI_SENSE_BUFFERSIZE);
1052                         memcpy(cmd->scmd->sense_buffer, cmd->sense,
1053                                SCSI_SENSE_BUFFERSIZE);
1054                         cmd->scmd->result |= DRIVER_SENSE << 24;
1055                 }
1056                 break;
1057
1058         case MFI_STAT_LD_OFFLINE:
1059         case MFI_STAT_DEVICE_NOT_FOUND:
1060                 cmd->scmd->result = DID_BAD_TARGET << 16;
1061                 break;
1062
1063         default:
1064                 printk(KERN_DEBUG "megasas: FW status %#x\n", status);
1065                 cmd->scmd->result = DID_ERROR << 16;
1066                 break;
1067         }
1068 }
1069
1070 /**
1071  * megasas_make_sgl_fusion -    Prepares 32-bit SGL
1072  * @instance:           Adapter soft state
1073  * @scp:                SCSI command from the mid-layer
1074  * @sgl_ptr:            SGL to be filled in
1075  * @cmd:                cmd we are working on
1076  *
1077  * If successful, this function returns the number of SG elements.
1078  */
1079 static int
1080 megasas_make_sgl_fusion(struct megasas_instance *instance,
1081                         struct scsi_cmnd *scp,
1082                         struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
1083                         struct megasas_cmd_fusion *cmd)
1084 {
1085         int i, sg_processed;
1086         int sge_count, sge_idx;
1087         struct scatterlist *os_sgl;
1088         struct fusion_context *fusion;
1089
1090         fusion = instance->ctrl_context;
1091
1092         cmd->io_request->ChainOffset = 0;
1093
1094         sge_count = scsi_dma_map(scp);
1095
1096         BUG_ON(sge_count < 0);
1097
1098         if (sge_count > instance->max_num_sge || !sge_count)
1099                 return sge_count;
1100
1101         if (sge_count > fusion->max_sge_in_main_msg) {
1102                 /* One element to store the chain info */
1103                 sge_idx = fusion->max_sge_in_main_msg - 1;
1104         } else
1105                 sge_idx = sge_count;
1106
1107         scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1108                 sgl_ptr->Length = sg_dma_len(os_sgl);
1109                 sgl_ptr->Address = sg_dma_address(os_sgl);
1110                 sgl_ptr->Flags = 0;
1111                 sgl_ptr++;
1112
1113                 sg_processed = i + 1;
1114
1115                 if ((sg_processed ==  (fusion->max_sge_in_main_msg - 1)) &&
1116                     (sge_count > fusion->max_sge_in_main_msg)) {
1117
1118                         struct MPI25_IEEE_SGE_CHAIN64 *sg_chain;
1119                         cmd->io_request->ChainOffset =
1120                                 fusion->chain_offset_io_request;
1121                         sg_chain = sgl_ptr;
1122                         /* Prepare chain element */
1123                         sg_chain->NextChainOffset = 0;
1124                         sg_chain->Flags = (IEEE_SGE_FLAGS_CHAIN_ELEMENT |
1125                                            MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR);
1126                         sg_chain->Length =  (sizeof(union MPI2_SGE_IO_UNION)
1127                                              *(sge_count - sg_processed));
1128                         sg_chain->Address = cmd->sg_frame_phys_addr;
1129
1130                         sgl_ptr =
1131                           (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
1132                 }
1133         }
1134
1135         return sge_count;
1136 }
1137
1138 /**
1139  * megasas_set_pd_lba - Sets PD LBA
1140  * @cdb:                CDB
1141  * @cdb_len:            cdb length
1142  * @start_blk:          Start block of IO
1143  *
1144  * Used to set the PD LBA in CDB for FP IOs
1145  */
1146 void
1147 megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
1148                    struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
1149                    struct MR_FW_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
1150 {
1151         struct MR_LD_RAID *raid;
1152         u32 ld;
1153         u64 start_blk = io_info->pdBlock;
1154         u8 *cdb = io_request->CDB.CDB32;
1155         u32 num_blocks = io_info->numBlocks;
1156         u8 opcode, flagvals, groupnum, control;
1157
1158         /* Check if T10 PI (DIF) is enabled for this LD */
1159         ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
1160         raid = MR_LdRaidGet(ld, local_map_ptr);
1161         if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
1162                 memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1163                 cdb[0] =  MEGASAS_SCSI_VARIABLE_LENGTH_CMD;
1164                 cdb[7] =  MEGASAS_SCSI_ADDL_CDB_LEN;
1165
1166                 if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1167                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32;
1168                 else
1169                         cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32;
1170                 cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL;
1171
1172                 /* LBA */
1173                 cdb[12] = (u8)((start_blk >> 56) & 0xff);
1174                 cdb[13] = (u8)((start_blk >> 48) & 0xff);
1175                 cdb[14] = (u8)((start_blk >> 40) & 0xff);
1176                 cdb[15] = (u8)((start_blk >> 32) & 0xff);
1177                 cdb[16] = (u8)((start_blk >> 24) & 0xff);
1178                 cdb[17] = (u8)((start_blk >> 16) & 0xff);
1179                 cdb[18] = (u8)((start_blk >> 8) & 0xff);
1180                 cdb[19] = (u8)(start_blk & 0xff);
1181
1182                 /* Logical block reference tag */
1183                 io_request->CDB.EEDP32.PrimaryReferenceTag =
1184                         cpu_to_be32(ref_tag);
1185                 io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0xffff;
1186
1187                 io_request->DataLength = num_blocks * 512;
1188                 io_request->IoFlags = 32; /* Specify 32-byte cdb */
1189
1190                 /* Transfer length */
1191                 cdb[28] = (u8)((num_blocks >> 24) & 0xff);
1192                 cdb[29] = (u8)((num_blocks >> 16) & 0xff);
1193                 cdb[30] = (u8)((num_blocks >> 8) & 0xff);
1194                 cdb[31] = (u8)(num_blocks & 0xff);
1195
1196                 /* set SCSI IO EEDPFlags */
1197                 if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) {
1198                         io_request->EEDPFlags =
1199                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG  |
1200                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
1201                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
1202                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
1203                                 MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD;
1204                 } else {
1205                         io_request->EEDPFlags =
1206                                 MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
1207                                 MPI2_SCSIIO_EEDPFLAGS_INSERT_OP;
1208                 }
1209                 io_request->Control |= (0x4 << 26);
1210                 io_request->EEDPBlockSize = MEGASAS_EEDPBLOCKSIZE;
1211         } else {
1212                 /* Some drives don't support 16/12 byte CDB's, convert to 10 */
1213                 if (((cdb_len == 12) || (cdb_len == 16)) &&
1214                     (start_blk <= 0xffffffff)) {
1215                         if (cdb_len == 16) {
1216                                 opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
1217                                 flagvals = cdb[1];
1218                                 groupnum = cdb[14];
1219                                 control = cdb[15];
1220                         } else {
1221                                 opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
1222                                 flagvals = cdb[1];
1223                                 groupnum = cdb[10];
1224                                 control = cdb[11];
1225                         }
1226
1227                         memset(cdb, 0, sizeof(io_request->CDB.CDB32));
1228
1229                         cdb[0] = opcode;
1230                         cdb[1] = flagvals;
1231                         cdb[6] = groupnum;
1232                         cdb[9] = control;
1233
1234                         /* Transfer length */
1235                         cdb[8] = (u8)(num_blocks & 0xff);
1236                         cdb[7] = (u8)((num_blocks >> 8) & 0xff);
1237
1238                         cdb_len = 10;
1239                 }
1240
1241                 /* Normal case, just load LBA here */
1242                 switch (cdb_len) {
1243                 case 6:
1244                 {
1245                         u8 val = cdb[1] & 0xE0;
1246                         cdb[3] = (u8)(start_blk & 0xff);
1247                         cdb[2] = (u8)((start_blk >> 8) & 0xff);
1248                         cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f);
1249                         break;
1250                 }
1251                 case 10:
1252                         cdb[5] = (u8)(start_blk & 0xff);
1253                         cdb[4] = (u8)((start_blk >> 8) & 0xff);
1254                         cdb[3] = (u8)((start_blk >> 16) & 0xff);
1255                         cdb[2] = (u8)((start_blk >> 24) & 0xff);
1256                         break;
1257                 case 12:
1258                         cdb[5]    = (u8)(start_blk & 0xff);
1259                         cdb[4]    = (u8)((start_blk >> 8) & 0xff);
1260                         cdb[3]    = (u8)((start_blk >> 16) & 0xff);
1261                         cdb[2]    = (u8)((start_blk >> 24) & 0xff);
1262                         break;
1263                 case 16:
1264                         cdb[9]    = (u8)(start_blk & 0xff);
1265                         cdb[8]    = (u8)((start_blk >> 8) & 0xff);
1266                         cdb[7]    = (u8)((start_blk >> 16) & 0xff);
1267                         cdb[6]    = (u8)((start_blk >> 24) & 0xff);
1268                         cdb[5]    = (u8)((start_blk >> 32) & 0xff);
1269                         cdb[4]    = (u8)((start_blk >> 40) & 0xff);
1270                         cdb[3]    = (u8)((start_blk >> 48) & 0xff);
1271                         cdb[2]    = (u8)((start_blk >> 56) & 0xff);
1272                         break;
1273                 }
1274         }
1275 }
1276
1277 /**
1278  * megasas_build_ldio_fusion -  Prepares IOs to devices
1279  * @instance:           Adapter soft state
1280  * @scp:                SCSI command
1281  * @cmd:                Command to be prepared
1282  *
1283  * Prepares the io_request and chain elements (sg_frame) for IO
1284  * The IO can be for PD (Fast Path) or LD
1285  */
1286 void
1287 megasas_build_ldio_fusion(struct megasas_instance *instance,
1288                           struct scsi_cmnd *scp,
1289                           struct megasas_cmd_fusion *cmd)
1290 {
1291         u8 fp_possible;
1292         u32 start_lba_lo, start_lba_hi, device_id;
1293         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
1294         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1295         struct IO_REQUEST_INFO io_info;
1296         struct fusion_context *fusion;
1297         struct MR_FW_RAID_MAP_ALL *local_map_ptr;
1298
1299         device_id = MEGASAS_DEV_INDEX(instance, scp);
1300
1301         fusion = instance->ctrl_context;
1302
1303         io_request = cmd->io_request;
1304         io_request->RaidContext.VirtualDiskTgtId = device_id;
1305         io_request->RaidContext.status = 0;
1306         io_request->RaidContext.exStatus = 0;
1307
1308         req_desc = (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)cmd->request_desc;
1309
1310         start_lba_lo = 0;
1311         start_lba_hi = 0;
1312         fp_possible = 0;
1313
1314         /*
1315          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1316          */
1317         if (scp->cmd_len == 6) {
1318                 io_request->DataLength = (u32) scp->cmnd[4];
1319                 start_lba_lo = ((u32) scp->cmnd[1] << 16) |
1320                         ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
1321
1322                 start_lba_lo &= 0x1FFFFF;
1323         }
1324
1325         /*
1326          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1327          */
1328         else if (scp->cmd_len == 10) {
1329                 io_request->DataLength = (u32) scp->cmnd[8] |
1330                         ((u32) scp->cmnd[7] << 8);
1331                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1332                         ((u32) scp->cmnd[3] << 16) |
1333                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1334         }
1335
1336         /*
1337          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1338          */
1339         else if (scp->cmd_len == 12) {
1340                 io_request->DataLength = ((u32) scp->cmnd[6] << 24) |
1341                         ((u32) scp->cmnd[7] << 16) |
1342                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1343                 start_lba_lo = ((u32) scp->cmnd[2] << 24) |
1344                         ((u32) scp->cmnd[3] << 16) |
1345                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1346         }
1347
1348         /*
1349          * 16-byte READ(0x88) or WRITE(0x8A) cdb
1350          */
1351         else if (scp->cmd_len == 16) {
1352                 io_request->DataLength = ((u32) scp->cmnd[10] << 24) |
1353                         ((u32) scp->cmnd[11] << 16) |
1354                         ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
1355                 start_lba_lo = ((u32) scp->cmnd[6] << 24) |
1356                         ((u32) scp->cmnd[7] << 16) |
1357                         ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
1358
1359                 start_lba_hi = ((u32) scp->cmnd[2] << 24) |
1360                         ((u32) scp->cmnd[3] << 16) |
1361                         ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
1362         }
1363
1364         memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO));
1365         io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
1366         io_info.numBlocks = io_request->DataLength;
1367         io_info.ldTgtId = device_id;
1368
1369         if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1370                 io_info.isRead = 1;
1371
1372         local_map_ptr = fusion->ld_map[(instance->map_id & 1)];
1373
1374         if ((MR_TargetIdToLdGet(device_id, local_map_ptr) >=
1375              MAX_LOGICAL_DRIVES) || (!fusion->fast_path_io)) {
1376                 io_request->RaidContext.regLockFlags  = 0;
1377                 fp_possible = 0;
1378         } else {
1379                 if (MR_BuildRaidContext(&io_info, &io_request->RaidContext,
1380                                         local_map_ptr))
1381                         fp_possible = io_info.fpOkForIo;
1382         }
1383
1384         if (fp_possible) {
1385                 megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
1386                                    local_map_ptr, start_lba_lo);
1387                 io_request->DataLength = scsi_bufflen(scp);
1388                 io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
1389                 cmd->request_desc->SCSIIO.RequestFlags =
1390                         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY
1391                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1392                 if ((fusion->load_balance_info[device_id].loadBalanceFlag) &&
1393                     (io_info.isRead)) {
1394                         io_info.devHandle =
1395                                 get_updated_dev_handle(
1396                                         &fusion->load_balance_info[device_id],
1397                                         &io_info);
1398                         scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG;
1399                 } else
1400                         scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
1401                 cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
1402                 io_request->DevHandle = io_info.devHandle;
1403         } else {
1404                 io_request->RaidContext.timeoutValue =
1405                         local_map_ptr->raidMap.fpPdIoTimeoutSec;
1406                 io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
1407                 io_request->DevHandle = device_id;
1408                 cmd->request_desc->SCSIIO.RequestFlags =
1409                         (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
1410                          << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1411         } /* Not FP */
1412 }
1413
1414 /**
1415  * megasas_build_dcdb_fusion -  Prepares IOs to devices
1416  * @instance:           Adapter soft state
1417  * @scp:                SCSI command
1418  * @cmd:                Command to be prepared
1419  *
1420  * Prepares the io_request frame for non-io cmds
1421  */
1422 static void
1423 megasas_build_dcdb_fusion(struct megasas_instance *instance,
1424                           struct scsi_cmnd *scmd,
1425                           struct megasas_cmd_fusion *cmd)
1426 {
1427         u32 device_id;
1428         struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
1429         u16 pd_index = 0;
1430         struct MR_FW_RAID_MAP_ALL *local_map_ptr;
1431         struct fusion_context *fusion = instance->ctrl_context;
1432
1433         io_request = cmd->io_request;
1434         device_id = MEGASAS_DEV_INDEX(instance, scmd);
1435         pd_index = (scmd->device->channel * MEGASAS_MAX_DEV_PER_CHANNEL)
1436                 +scmd->device->id;
1437         local_map_ptr = fusion->ld_map[(instance->map_id & 1)];
1438
1439         /* Check if this is a system PD I/O */
1440         if (instance->pd_list[pd_index].driveState == MR_PD_STATE_SYSTEM) {
1441                 io_request->Function = 0;
1442                 io_request->DevHandle =
1443                         local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
1444                 io_request->RaidContext.timeoutValue =
1445                         local_map_ptr->raidMap.fpPdIoTimeoutSec;
1446                 io_request->RaidContext.regLockFlags = 0;
1447                 io_request->RaidContext.regLockRowLBA = 0;
1448                 io_request->RaidContext.regLockLength = 0;
1449                 io_request->RaidContext.RAIDFlags =
1450                         MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD <<
1451                         MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
1452                 cmd->request_desc->SCSIIO.RequestFlags =
1453                         (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
1454                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1455         } else {
1456                 io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
1457                 io_request->DevHandle = device_id;
1458                 cmd->request_desc->SCSIIO.RequestFlags =
1459                         (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
1460                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1461         }
1462         io_request->RaidContext.VirtualDiskTgtId = device_id;
1463         io_request->LUN[1] = scmd->device->lun;
1464         io_request->DataLength = scsi_bufflen(scmd);
1465 }
1466
1467 /**
1468  * megasas_build_io_fusion -    Prepares IOs to devices
1469  * @instance:           Adapter soft state
1470  * @scp:                SCSI command
1471  * @cmd:                Command to be prepared
1472  *
1473  * Invokes helper functions to prepare request frames
1474  * and sets flags appropriate for IO/Non-IO cmd
1475  */
1476 int
1477 megasas_build_io_fusion(struct megasas_instance *instance,
1478                         struct scsi_cmnd *scp,
1479                         struct megasas_cmd_fusion *cmd)
1480 {
1481         u32 device_id, sge_count;
1482         struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
1483
1484         device_id = MEGASAS_DEV_INDEX(instance, scp);
1485
1486         /* Zero out some fields so they don't get reused */
1487         io_request->LUN[1] = 0;
1488         io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
1489         io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
1490         io_request->EEDPFlags = 0;
1491         io_request->Control = 0;
1492         io_request->EEDPBlockSize = 0;
1493         io_request->IoFlags = 0;
1494         io_request->RaidContext.RAIDFlags = 0;
1495
1496         memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len);
1497         /*
1498          * Just the CDB length,rest of the Flags are zero
1499          * This will be modified for FP in build_ldio_fusion
1500          */
1501         io_request->IoFlags = scp->cmd_len;
1502
1503         if (megasas_is_ldio(scp))
1504                 megasas_build_ldio_fusion(instance, scp, cmd);
1505         else
1506                 megasas_build_dcdb_fusion(instance, scp, cmd);
1507
1508         /*
1509          * Construct SGL
1510          */
1511
1512         sge_count =
1513                 megasas_make_sgl_fusion(instance, scp,
1514                                         (struct MPI25_IEEE_SGE_CHAIN64 *)
1515                                         &io_request->SGL, cmd);
1516
1517         if (sge_count > instance->max_num_sge) {
1518                 printk(KERN_ERR "megasas: Error. sge_count (0x%x) exceeds "
1519                        "max (0x%x) allowed\n", sge_count,
1520                        instance->max_num_sge);
1521                 return 1;
1522         }
1523
1524         io_request->RaidContext.numSGE = sge_count;
1525
1526         io_request->SGLFlags = MPI2_SGE_FLAGS_64_BIT_ADDRESSING;
1527
1528         if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1529                 io_request->Control |= MPI2_SCSIIO_CONTROL_WRITE;
1530         else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1531                 io_request->Control |= MPI2_SCSIIO_CONTROL_READ;
1532
1533         io_request->SGLOffset0 =
1534                 offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4;
1535
1536         io_request->SenseBufferLowAddress = cmd->sense_phys_addr;
1537         io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
1538
1539         cmd->scmd = scp;
1540         scp->SCp.ptr = (char *)cmd;
1541
1542         return 0;
1543 }
1544
1545 union MEGASAS_REQUEST_DESCRIPTOR_UNION *
1546 megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
1547 {
1548         u8 *p;
1549         struct fusion_context *fusion;
1550
1551         if (index >= instance->max_fw_cmds) {
1552                 printk(KERN_ERR "megasas: Invalid SMID (0x%x)request for "
1553                        "descriptor\n", index);
1554                 return NULL;
1555         }
1556         fusion = instance->ctrl_context;
1557         p = fusion->req_frames_desc
1558                 +sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *index;
1559
1560         return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
1561 }
1562
1563 /**
1564  * megasas_build_and_issue_cmd_fusion -Main routine for building and
1565  *                                     issuing non IOCTL cmd
1566  * @instance:                   Adapter soft state
1567  * @scmd:                       pointer to scsi cmd from OS
1568  */
1569 static u32
1570 megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
1571                                    struct scsi_cmnd *scmd)
1572 {
1573         struct megasas_cmd_fusion *cmd;
1574         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1575         u32 index;
1576         struct fusion_context *fusion;
1577
1578         fusion = instance->ctrl_context;
1579
1580         cmd = megasas_get_cmd_fusion(instance);
1581         if (!cmd)
1582                 return SCSI_MLQUEUE_HOST_BUSY;
1583
1584         index = cmd->index;
1585
1586         req_desc = megasas_get_request_descriptor(instance, index-1);
1587         if (!req_desc)
1588                 return 1;
1589
1590         req_desc->Words = 0;
1591         cmd->request_desc = req_desc;
1592         cmd->request_desc->Words = 0;
1593
1594         if (megasas_build_io_fusion(instance, scmd, cmd)) {
1595                 megasas_return_cmd_fusion(instance, cmd);
1596                 printk(KERN_ERR "megasas: Error building command.\n");
1597                 cmd->request_desc = NULL;
1598                 return 1;
1599         }
1600
1601         req_desc = cmd->request_desc;
1602         req_desc->SCSIIO.SMID = index;
1603
1604         if (cmd->io_request->ChainOffset != 0 &&
1605             cmd->io_request->ChainOffset != 0xF)
1606                 printk(KERN_ERR "megasas: The chain offset value is not "
1607                        "correct : %x\n", cmd->io_request->ChainOffset);
1608
1609         /*
1610          * Issue the command to the FW
1611          */
1612         atomic_inc(&instance->fw_outstanding);
1613
1614         instance->instancet->fire_cmd(instance,
1615                                       req_desc->u.low, req_desc->u.high,
1616                                       instance->reg_set);
1617
1618         return 0;
1619 }
1620
1621 /**
1622  * complete_cmd_fusion -        Completes command
1623  * @instance:                   Adapter soft state
1624  * Completes all commands that is in reply descriptor queue
1625  */
1626 int
1627 complete_cmd_fusion(struct megasas_instance *instance)
1628 {
1629         union MPI2_REPLY_DESCRIPTORS_UNION *desc;
1630         struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc;
1631         struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
1632         struct fusion_context *fusion;
1633         struct megasas_cmd *cmd_mfi;
1634         struct megasas_cmd_fusion *cmd_fusion;
1635         u16 smid, num_completed;
1636         u8 reply_descript_type, arm;
1637         u32 status, extStatus, device_id;
1638         union desc_value d_val;
1639         struct LD_LOAD_BALANCE_INFO *lbinfo;
1640
1641         fusion = instance->ctrl_context;
1642
1643         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
1644                 return IRQ_HANDLED;
1645
1646         desc = fusion->reply_frames_desc;
1647         desc += fusion->last_reply_idx;
1648
1649         reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
1650
1651         d_val.word = desc->Words;
1652
1653         reply_descript_type = reply_desc->ReplyFlags &
1654                 MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
1655
1656         if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
1657                 return IRQ_NONE;
1658
1659         d_val.word = desc->Words;
1660
1661         num_completed = 0;
1662
1663         while ((d_val.u.low != UINT_MAX) && (d_val.u.high != UINT_MAX)) {
1664                 smid = reply_desc->SMID;
1665
1666                 cmd_fusion = fusion->cmd_list[smid - 1];
1667
1668                 scsi_io_req =
1669                         (struct MPI2_RAID_SCSI_IO_REQUEST *)
1670                   cmd_fusion->io_request;
1671
1672                 if (cmd_fusion->scmd)
1673                         cmd_fusion->scmd->SCp.ptr = NULL;
1674
1675                 status = scsi_io_req->RaidContext.status;
1676                 extStatus = scsi_io_req->RaidContext.exStatus;
1677
1678                 switch (scsi_io_req->Function) {
1679                 case MPI2_FUNCTION_SCSI_IO_REQUEST:  /*Fast Path IO.*/
1680                         /* Update load balancing info */
1681                         device_id = MEGASAS_DEV_INDEX(instance,
1682                                                       cmd_fusion->scmd);
1683                         lbinfo = &fusion->load_balance_info[device_id];
1684                         if (cmd_fusion->scmd->SCp.Status &
1685                             MEGASAS_LOAD_BALANCE_FLAG) {
1686                                 arm = lbinfo->raid1DevHandle[0] ==
1687                                         cmd_fusion->io_request->DevHandle ? 0 :
1688                                         1;
1689                                 atomic_dec(&lbinfo->scsi_pending_cmds[arm]);
1690                                 cmd_fusion->scmd->SCp.Status &=
1691                                         ~MEGASAS_LOAD_BALANCE_FLAG;
1692                         }
1693                         if (reply_descript_type ==
1694                             MPI2_RPY_DESCRIPT_FLAGS_SCSI_IO_SUCCESS) {
1695                                 if (megasas_dbg_lvl == 5)
1696                                         printk(KERN_ERR "\nmegasas: FAST Path "
1697                                                "IO Success\n");
1698                         }
1699                         /* Fall thru and complete IO */
1700                 case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
1701                         /* Map the FW Cmd Status */
1702                         map_cmd_status(cmd_fusion, status, extStatus);
1703                         scsi_dma_unmap(cmd_fusion->scmd);
1704                         cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
1705                         scsi_io_req->RaidContext.status = 0;
1706                         scsi_io_req->RaidContext.exStatus = 0;
1707                         megasas_return_cmd_fusion(instance, cmd_fusion);
1708                         atomic_dec(&instance->fw_outstanding);
1709
1710                         break;
1711                 case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
1712                         cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
1713                         megasas_complete_cmd(instance, cmd_mfi, DID_OK);
1714                         cmd_fusion->flags = 0;
1715                         megasas_return_cmd_fusion(instance, cmd_fusion);
1716
1717                         break;
1718                 }
1719
1720                 fusion->last_reply_idx++;
1721                 if (fusion->last_reply_idx >= fusion->reply_q_depth)
1722                         fusion->last_reply_idx = 0;
1723
1724                 desc->Words = ULLONG_MAX;
1725                 num_completed++;
1726
1727                 /* Get the next reply descriptor */
1728                 if (!fusion->last_reply_idx)
1729                         desc = fusion->reply_frames_desc;
1730                 else
1731                         desc++;
1732
1733                 reply_desc =
1734                   (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
1735
1736                 d_val.word = desc->Words;
1737
1738                 reply_descript_type = reply_desc->ReplyFlags &
1739                         MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
1740
1741                 if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
1742                         break;
1743         }
1744
1745         if (!num_completed)
1746                 return IRQ_NONE;
1747
1748         wmb();
1749         writel(fusion->last_reply_idx,
1750                &instance->reg_set->reply_post_host_index);
1751         megasas_check_and_restore_queue_depth(instance);
1752         return IRQ_HANDLED;
1753 }
1754
1755 /**
1756  * megasas_complete_cmd_dpc_fusion -    Completes command
1757  * @instance:                   Adapter soft state
1758  *
1759  * Tasklet to complete cmds
1760  */
1761 void
1762 megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
1763 {
1764         struct megasas_instance *instance =
1765                 (struct megasas_instance *)instance_addr;
1766         unsigned long flags;
1767
1768         /* If we have already declared adapter dead, donot complete cmds */
1769         spin_lock_irqsave(&instance->hba_lock, flags);
1770         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
1771                 spin_unlock_irqrestore(&instance->hba_lock, flags);
1772                 return;
1773         }
1774         spin_unlock_irqrestore(&instance->hba_lock, flags);
1775
1776         spin_lock_irqsave(&instance->completion_lock, flags);
1777         complete_cmd_fusion(instance);
1778         spin_unlock_irqrestore(&instance->completion_lock, flags);
1779 }
1780
1781 /**
1782  * megasas_isr_fusion - isr entry point
1783  */
1784 irqreturn_t megasas_isr_fusion(int irq, void *devp)
1785 {
1786         struct megasas_instance *instance = (struct megasas_instance *)devp;
1787         u32 mfiStatus, fw_state;
1788
1789         if (!instance->msi_flag) {
1790                 mfiStatus = instance->instancet->clear_intr(instance->reg_set);
1791                 if (!mfiStatus)
1792                         return IRQ_NONE;
1793         }
1794
1795         /* If we are resetting, bail */
1796         if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags))
1797                 return IRQ_HANDLED;
1798
1799         if (!complete_cmd_fusion(instance)) {
1800                 /* If we didn't complete any commands, check for FW fault */
1801                 fw_state = instance->instancet->read_fw_status_reg(
1802                         instance->reg_set) & MFI_STATE_MASK;
1803                 if (fw_state == MFI_STATE_FAULT)
1804                         schedule_work(&instance->work_init);
1805         }
1806
1807         return IRQ_HANDLED;
1808 }
1809
1810 /**
1811  * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru
1812  * @instance:                   Adapter soft state
1813  * mfi_cmd:                     megasas_cmd pointer
1814  *
1815  */
1816 u8
1817 build_mpt_mfi_pass_thru(struct megasas_instance *instance,
1818                         struct megasas_cmd *mfi_cmd)
1819 {
1820         struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain;
1821         struct MPI2_RAID_SCSI_IO_REQUEST *io_req;
1822         struct megasas_cmd_fusion *cmd;
1823         struct fusion_context *fusion;
1824         struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
1825
1826         cmd = megasas_get_cmd_fusion(instance);
1827         if (!cmd)
1828                 return 1;
1829
1830         /*  Save the smid. To be used for returning the cmd */
1831         mfi_cmd->context.smid = cmd->index;
1832
1833         cmd->sync_cmd_idx = mfi_cmd->index;
1834
1835         /*
1836          * For cmds where the flag is set, store the flag and check
1837          * on completion. For cmds with this flag, don't call
1838          * megasas_complete_cmd
1839          */
1840
1841         if (frame_hdr->flags & MFI_FRAME_DONT_POST_IN_REPLY_QUEUE)
1842                 cmd->flags = MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
1843
1844         fusion = instance->ctrl_context;
1845         io_req = cmd->io_request;
1846         mpi25_ieee_chain =
1847           (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain;
1848
1849         io_req->Function    = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST;
1850         io_req->SGLOffset0  = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST,
1851                                        SGL) / 4;
1852         io_req->ChainOffset = fusion->chain_offset_mfi_pthru;
1853
1854         mpi25_ieee_chain->Address = mfi_cmd->frame_phys_addr;
1855
1856         mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
1857                 MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR;
1858
1859         mpi25_ieee_chain->Length = MEGASAS_MAX_SZ_CHAIN_FRAME;
1860
1861         return 0;
1862 }
1863
1864 /**
1865  * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd
1866  * @instance:                   Adapter soft state
1867  * @cmd:                        mfi cmd to build
1868  *
1869  */
1870 union MEGASAS_REQUEST_DESCRIPTOR_UNION *
1871 build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
1872 {
1873         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1874         u16 index;
1875
1876         if (build_mpt_mfi_pass_thru(instance, cmd)) {
1877                 printk(KERN_ERR "Couldn't build MFI pass thru cmd\n");
1878                 return NULL;
1879         }
1880
1881         index = cmd->context.smid;
1882
1883         req_desc = megasas_get_request_descriptor(instance, index - 1);
1884
1885         if (!req_desc)
1886                 return NULL;
1887
1888         req_desc->Words = 0;
1889         req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
1890                                          MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
1891
1892         req_desc->SCSIIO.SMID = index;
1893
1894         return req_desc;
1895 }
1896
1897 /**
1898  * megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd
1899  * @instance:                   Adapter soft state
1900  * @cmd:                        mfi cmd pointer
1901  *
1902  */
1903 void
1904 megasas_issue_dcmd_fusion(struct megasas_instance *instance,
1905                           struct megasas_cmd *cmd)
1906 {
1907         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
1908         union desc_value d_val;
1909
1910         req_desc = build_mpt_cmd(instance, cmd);
1911         if (!req_desc) {
1912                 printk(KERN_ERR "Couldn't issue MFI pass thru cmd\n");
1913                 return;
1914         }
1915         d_val.word = req_desc->Words;
1916
1917         instance->instancet->fire_cmd(instance, req_desc->u.low,
1918                                       req_desc->u.high, instance->reg_set);
1919 }
1920
1921 /**
1922  * megasas_release_fusion -     Reverses the FW initialization
1923  * @intance:                    Adapter soft state
1924  */
1925 void
1926 megasas_release_fusion(struct megasas_instance *instance)
1927 {
1928         megasas_free_cmds(instance);
1929         megasas_free_cmds_fusion(instance);
1930
1931         iounmap(instance->reg_set);
1932
1933         pci_release_selected_regions(instance->pdev, instance->bar);
1934 }
1935
1936 /**
1937  * megasas_read_fw_status_reg_fusion - returns the current FW status value
1938  * @regs:                       MFI register set
1939  */
1940 static u32
1941 megasas_read_fw_status_reg_fusion(struct megasas_register_set __iomem *regs)
1942 {
1943         return readl(&(regs)->outbound_scratch_pad);
1944 }
1945
1946 /**
1947  * megasas_adp_reset_fusion -   For controller reset
1948  * @regs:                               MFI register set
1949  */
1950 static int
1951 megasas_adp_reset_fusion(struct megasas_instance *instance,
1952                          struct megasas_register_set __iomem *regs)
1953 {
1954         return 0;
1955 }
1956
1957 /**
1958  * megasas_check_reset_fusion - For controller reset check
1959  * @regs:                               MFI register set
1960  */
1961 static int
1962 megasas_check_reset_fusion(struct megasas_instance *instance,
1963                            struct megasas_register_set __iomem *regs)
1964 {
1965         return 0;
1966 }
1967
1968 /* This function waits for outstanding commands on fusion to complete */
1969 int megasas_wait_for_outstanding_fusion(struct megasas_instance *instance)
1970 {
1971         int i, outstanding, retval = 0;
1972         u32 fw_state, wait_time = MEGASAS_RESET_WAIT_TIME;
1973
1974         for (i = 0; i < wait_time; i++) {
1975                 /* Check if firmware is in fault state */
1976                 fw_state = instance->instancet->read_fw_status_reg(
1977                         instance->reg_set) & MFI_STATE_MASK;
1978                 if (fw_state == MFI_STATE_FAULT) {
1979                         printk(KERN_WARNING "megasas: Found FW in FAULT state,"
1980                                " will reset adapter.\n");
1981                         retval = 1;
1982                         goto out;
1983                 }
1984
1985                 outstanding = atomic_read(&instance->fw_outstanding);
1986                 if (!outstanding)
1987                         goto out;
1988
1989                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
1990                         printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
1991                                "commands to complete\n", i, outstanding);
1992                         megasas_complete_cmd_dpc_fusion(
1993                                 (unsigned long)instance);
1994                 }
1995                 msleep(1000);
1996         }
1997
1998         if (atomic_read(&instance->fw_outstanding)) {
1999                 printk("megaraid_sas: pending commands remain after waiting, "
2000                        "will reset adapter.\n");
2001                 retval = 1;
2002         }
2003 out:
2004         return retval;
2005 }
2006
2007 void  megasas_reset_reply_desc(struct megasas_instance *instance)
2008 {
2009         int i;
2010         struct fusion_context *fusion;
2011         union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
2012
2013         fusion = instance->ctrl_context;
2014         fusion->last_reply_idx = 0;
2015         reply_desc = fusion->reply_frames_desc;
2016         for (i = 0 ; i < fusion->reply_q_depth; i++, reply_desc++)
2017                 reply_desc->Words = ULLONG_MAX;
2018 }
2019
2020 /* Core fusion reset function */
2021 int megasas_reset_fusion(struct Scsi_Host *shost)
2022 {
2023         int retval = SUCCESS, i, j, retry = 0;
2024         struct megasas_instance *instance;
2025         struct megasas_cmd_fusion *cmd_fusion;
2026         struct fusion_context *fusion;
2027         struct megasas_cmd *cmd_mfi;
2028         union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
2029         u32 host_diag, abs_state;
2030
2031         instance = (struct megasas_instance *)shost->hostdata;
2032         fusion = instance->ctrl_context;
2033
2034         mutex_lock(&instance->reset_mutex);
2035         set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2036         instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
2037         instance->instancet->disable_intr(instance->reg_set);
2038         msleep(1000);
2039
2040         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
2041                 printk(KERN_WARNING "megaraid_sas: Hardware critical error, "
2042                        "returning FAILED.\n");
2043                 retval = FAILED;
2044                 goto out;
2045         }
2046
2047         /* First try waiting for commands to complete */
2048         if (megasas_wait_for_outstanding_fusion(instance)) {
2049                 printk(KERN_WARNING "megaraid_sas: resetting fusion "
2050                        "adapter.\n");
2051                 /* Now return commands back to the OS */
2052                 for (i = 0 ; i < instance->max_fw_cmds; i++) {
2053                         cmd_fusion = fusion->cmd_list[i];
2054                         if (cmd_fusion->scmd) {
2055                                 scsi_dma_unmap(cmd_fusion->scmd);
2056                                 cmd_fusion->scmd->result = (DID_RESET << 16);
2057                                 cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
2058                                 megasas_return_cmd_fusion(instance, cmd_fusion);
2059                                 atomic_dec(&instance->fw_outstanding);
2060                         }
2061                 }
2062
2063                 if (instance->disableOnlineCtrlReset == 1) {
2064                         /* Reset not supported, kill adapter */
2065                         printk(KERN_WARNING "megaraid_sas: Reset not supported"
2066                                ", killing adapter.\n");
2067                         megaraid_sas_kill_hba(instance);
2068                         instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
2069                         retval = FAILED;
2070                         goto out;
2071                 }
2072
2073                 /* Now try to reset the chip */
2074                 for (i = 0; i < MEGASAS_FUSION_MAX_RESET_TRIES; i++) {
2075                         writel(MPI2_WRSEQ_FLUSH_KEY_VALUE,
2076                                &instance->reg_set->fusion_seq_offset);
2077                         writel(MPI2_WRSEQ_1ST_KEY_VALUE,
2078                                &instance->reg_set->fusion_seq_offset);
2079                         writel(MPI2_WRSEQ_2ND_KEY_VALUE,
2080                                &instance->reg_set->fusion_seq_offset);
2081                         writel(MPI2_WRSEQ_3RD_KEY_VALUE,
2082                                &instance->reg_set->fusion_seq_offset);
2083                         writel(MPI2_WRSEQ_4TH_KEY_VALUE,
2084                                &instance->reg_set->fusion_seq_offset);
2085                         writel(MPI2_WRSEQ_5TH_KEY_VALUE,
2086                                &instance->reg_set->fusion_seq_offset);
2087                         writel(MPI2_WRSEQ_6TH_KEY_VALUE,
2088                                &instance->reg_set->fusion_seq_offset);
2089
2090                         /* Check that the diag write enable (DRWE) bit is on */
2091                         host_diag = readl(&instance->reg_set->fusion_host_diag);
2092                         while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
2093                                 msleep(100);
2094                                 host_diag =
2095                                 readl(&instance->reg_set->fusion_host_diag);
2096                                 if (retry++ == 100) {
2097                                         printk(KERN_WARNING "megaraid_sas: "
2098                                                "Host diag unlock failed!\n");
2099                                         break;
2100                                 }
2101                         }
2102                         if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
2103                                 continue;
2104
2105                         /* Send chip reset command */
2106                         writel(host_diag | HOST_DIAG_RESET_ADAPTER,
2107                                &instance->reg_set->fusion_host_diag);
2108                         msleep(3000);
2109
2110                         /* Make sure reset adapter bit is cleared */
2111                         host_diag = readl(&instance->reg_set->fusion_host_diag);
2112                         retry = 0;
2113                         while (host_diag & HOST_DIAG_RESET_ADAPTER) {
2114                                 msleep(100);
2115                                 host_diag =
2116                                 readl(&instance->reg_set->fusion_host_diag);
2117                                 if (retry++ == 1000) {
2118                                         printk(KERN_WARNING "megaraid_sas: "
2119                                                "Diag reset adapter never "
2120                                                "cleared!\n");
2121                                         break;
2122                                 }
2123                         }
2124                         if (host_diag & HOST_DIAG_RESET_ADAPTER)
2125                                 continue;
2126
2127                         abs_state =
2128                                 instance->instancet->read_fw_status_reg(
2129                                         instance->reg_set);
2130                         retry = 0;
2131
2132                         while ((abs_state <= MFI_STATE_FW_INIT) &&
2133                                (retry++ < 1000)) {
2134                                 msleep(100);
2135                                 abs_state =
2136                                 instance->instancet->read_fw_status_reg(
2137                                         instance->reg_set);
2138                         }
2139                         if (abs_state <= MFI_STATE_FW_INIT) {
2140                                 printk(KERN_WARNING "megaraid_sas: firmware "
2141                                        "state < MFI_STATE_FW_INIT, state = "
2142                                        "0x%x\n", abs_state);
2143                                 continue;
2144                         }
2145
2146                         /* Wait for FW to become ready */
2147                         if (megasas_transition_to_ready(instance)) {
2148                                 printk(KERN_WARNING "megaraid_sas: Failed to "
2149                                        "transition controller to ready.\n");
2150                                 continue;
2151                         }
2152
2153                         megasas_reset_reply_desc(instance);
2154                         if (megasas_ioc_init_fusion(instance)) {
2155                                 printk(KERN_WARNING "megaraid_sas: "
2156                                        "megasas_ioc_init_fusion() failed!\n");
2157                                 continue;
2158                         }
2159
2160                         instance->instancet->enable_intr(instance->reg_set);
2161                         instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
2162
2163                         /* Re-fire management commands */
2164                         for (j = 0 ; j < instance->max_fw_cmds; j++) {
2165                                 cmd_fusion = fusion->cmd_list[j];
2166                                 if (cmd_fusion->sync_cmd_idx !=
2167                                     (u32)ULONG_MAX) {
2168                                         cmd_mfi =
2169                                         instance->
2170                                         cmd_list[cmd_fusion->sync_cmd_idx];
2171                                         if (cmd_mfi->frame->dcmd.opcode ==
2172                                             MR_DCMD_LD_MAP_GET_INFO) {
2173                                                 megasas_return_cmd(instance,
2174                                                                    cmd_mfi);
2175                                                 megasas_return_cmd_fusion(
2176                                                         instance, cmd_fusion);
2177                                         } else  {
2178                                                 req_desc =
2179                                                 megasas_get_request_descriptor(
2180                                                         instance,
2181                                                         cmd_mfi->context.smid
2182                                                         -1);
2183                                                 if (!req_desc)
2184                                                         printk(KERN_WARNING
2185                                                                "req_desc NULL"
2186                                                                "\n");
2187                                                 else {
2188                                                         instance->instancet->
2189                                                         fire_cmd(instance,
2190                                                                  req_desc->
2191                                                                  u.low,
2192                                                                  req_desc->
2193                                                                  u.high,
2194                                                                  instance->
2195                                                                  reg_set);
2196                                                 }
2197                                         }
2198                                 }
2199                         }
2200
2201                         /* Reset load balance info */
2202                         memset(fusion->load_balance_info, 0,
2203                                sizeof(struct LD_LOAD_BALANCE_INFO)
2204                                *MAX_LOGICAL_DRIVES);
2205
2206                         if (!megasas_get_map_info(instance))
2207                                 megasas_sync_map_info(instance);
2208
2209                         /* Adapter reset completed successfully */
2210                         printk(KERN_WARNING "megaraid_sas: Reset "
2211                                "successful.\n");
2212                         retval = SUCCESS;
2213                         goto out;
2214                 }
2215                 /* Reset failed, kill the adapter */
2216                 printk(KERN_WARNING "megaraid_sas: Reset failed, killing "
2217                        "adapter.\n");
2218                 megaraid_sas_kill_hba(instance);
2219                 retval = FAILED;
2220         } else {
2221                 instance->instancet->enable_intr(instance->reg_set);
2222                 instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
2223         }
2224 out:
2225         clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
2226         mutex_unlock(&instance->reset_mutex);
2227         return retval;
2228 }
2229
2230 /* Fusion OCR work queue */
2231 void megasas_fusion_ocr_wq(struct work_struct *work)
2232 {
2233         struct megasas_instance *instance =
2234                 container_of(work, struct megasas_instance, work_init);
2235
2236         megasas_reset_fusion(instance->host);
2237 }
2238
2239 struct megasas_instance_template megasas_instance_template_fusion = {
2240         .fire_cmd = megasas_fire_cmd_fusion,
2241         .enable_intr = megasas_enable_intr_fusion,
2242         .disable_intr = megasas_disable_intr_fusion,
2243         .clear_intr = megasas_clear_intr_fusion,
2244         .read_fw_status_reg = megasas_read_fw_status_reg_fusion,
2245         .adp_reset = megasas_adp_reset_fusion,
2246         .check_reset = megasas_check_reset_fusion,
2247         .service_isr = megasas_isr_fusion,
2248         .tasklet = megasas_complete_cmd_dpc_fusion,
2249         .init_adapter = megasas_init_adapter_fusion,
2250         .build_and_issue_cmd = megasas_build_and_issue_cmd_fusion,
2251         .issue_dcmd = megasas_issue_dcmd_fusion,
2252 };